Even as nonprofits are put on the defensive by political polarization, inequality, climate change, and other threats, many of them still seek out opportunities to expand their impact. For those dissatisfied with small steps forward, mergers present the chance to leap ahead. But it won't be easy.   "It takes a lot of time," says David La Piana, managing partner of La Piana Consulting. "There are opportunity costs, things you could be doing but you won't because you're dedicating energy to the merger. And it is risky." In this recording from SSIR's 2019 NMI conference, La Piana discusses common roadblocks to successful mergers and strategies for surmounting them.